<table>
  <tr>
    <td>
      <select class="form-control" [(ngModel)]="myFirstModel" (change)="changeFrist()">
        <option *ngFor="let opt of ListData1" value="{{opt.id}}">{{opt.name}}</option>
      </select>
    </td>
    <td>
      <select [(ngModel)]="myModel" class="form-control">
        <option *ngFor="let opt of ListData2" value="{{opt.id}}">{{opt.name}}</option>
      </select>
    </td>
  </tr>
</table>